2 wheel th350 to 4wheel th350 conversion

[00-dirt]

I Have a 74 chevy k-10 Auto. I call it frankentruck because everytime i go to fix something, i find a part that came from a different truck. That is what has actually led me here. My trans quit on me saturday. I have up to 20mph and then it s like it slips out of gear and revs to the moon. Upon further investigation i found the truck has a 700r4 and np208 tranfercase. The trans does not have a plug ran to it for the lock out and i dont know what else it has wrong lol. I am now going to throw a th350 in it and need to know if there are different size out put shafts for the 4x4 th350 trans. I know there are more than one size for the 2wd. Can anyone help a newby out. This is also my first full size and first 4x4 truck.

 

[bucket]

They are both 27 spline outputs. It's the th400 and SM465 that have the larger 32 spline output. You just need the short tail th350 and a fitzall (sp?) spacer to make it work with your current t-case. Might need to trim the output slightly. HRPC did the exact same swap, he knows exactly what needs done... hopefully he will chime in.

 

[Swims350]

if you can get the fitzall or even tci kit it comes with the correct length shaft for the inside and the spacer. mine did, but that's to make a short tail fit right in place of a 700r4, no driveshaft or crossmember mods, not moving forward or back or anything.